Which statement correctly distinguishes a Cargo package, a crate, and a module?

Which statement correctly distinguishes a Cargo package, a crate, and a module?

1. A package is described by Cargo.toml, a crate is one compilation unit, and modules organize names inside a crate.
2. Every Rust source file is a separate package and crate.
3. A package may contain only one binary crate and any number of library crates.
4. Modules are Cargo targets, while crates are only filesystem directories.